How do we know that we are justified by grace?

The Apostle Paul clarifies in Romans 3:23-24 that all people have sinned and fall short of God's glory. However, he also offers the assurance that we are justified by God's grace as a gift, through the redemption that is in Christ Jesus. This means that God's grace provides righteousness to those who believe in Christ, making justification not a result of our works but solely through God's grace. This underscores the foundational aspect of sovereign grace theology, which asserts that our justification is purely by God's unmerited favor.